<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar title="登录" class="page-nav-bar">
      <van-icon slot="left" name="cross" @click="$router.back()"></van-icon>
    </van-nav-bar>

    <!-- 登录表单 -->
    <van-form @submit="onSubmit" ref="loginForm">
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>

      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!--
            time 显示 倒计时
           -->
          <van-count-down
            :time="1000 * 60"
            format="ss s"
            v-if="isCountDownShow"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            round
            size="small"
            type="default"
            native-type="button"
            @click="onSendSms"
            >发送验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit"
          >提交</van-button
        >
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '../../api/user'
export default {
  name: 'LoginIndex',
  data () {
    return {
      user: {
        mobile: '', // 手机号
        code: '' // 验证码
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false
    }
  },
  methods: {
    async onSubmit () {
      // 1、获取表单数据
      // const user = this.user
      //  2、表单验证

      this.$toast.loading({
        message: '登录中...', // 如果网络加载慢，则显示登录中
        forbidClick: true, // 禁用背景被点击
        duration: 0 // 持续时间，默认是2000， 如果为0则持续展示
      })

      // 3、提交表单请求登录
      try {
        const { data } = await login(this.user)
        // console.log("登录成功", res);
        this.$store.commit('setUser', data.data)

        this.$toast.success('登录成功')
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机或验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
        }
      }

      // 4、根据请求响应结果 处理后续操作
    },
    async onSendSms () {
      // 1、验证手机号
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)
      }
      // console.log(123);

      // 2、验证通过，显示倒计时
      this.isCountDownShow = true

      // 3、请求发送验证码
      try {
        await sendSms(this.user.mobile)
      } catch (err) {
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁,请稍后重试')
        } else {
          this.$toast('发送失败,请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
}

.send-sms-btn {
  width: 156px;
  height: 46px;
  line-height: 46px;
  background-color: #ededed;
  font-size: 22px;
  color: #666;
}

.login-btn-wrap {
  padding: 53px 33px;
  .login-btn {
    background-color: #6db4fb;
    border: none;
  }
}
</style>
